Have You Been Converted?. L.P. Gas & Natural Gas Conversions--Vehicle - Westbourne Park, SA . Kind: Automotive, Fleet, Vapour Injection. Brand: Prins Injection. Service: Installations, Repairs, Servicing. Make: Ford, Holden, Mazda, Mitsubishi, Toyota. Vehicle: 4WDs, Cars, Vans. Payment Concern: Government Rebate